Bump pytorch lightning compat (awslabs#3195)

*Issue #, if available:*
https://github.com/awslabs/gluonts/security/dependabot/23

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requirements/requirements-pytorch.txt

@@ -1,6 +1,6 @@
 torch>=1.9,<3
-lightning>=2.0,<2.2
+lightning>=2.2.2,<2.4
 # Capping `lightning` does not cap `pytorch_lightning`, so we cap manually
-pytorch_lightning>=2.0,<2.2
+pytorch_lightning>=2.2.2,<2.4
 scipy~=1.10; python_version > "3.7.0"
 scipy~=1.7.3; python_version <= "3.7.0"